Microwave absorbing properties of polyaniline/multi-walled carbon nanotube composites with various polyaniline contents
Microwave absorbing properties of polyaniline/multi-walled carbon nanotube composites with various polyaniline contents
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DOI：
10.1016/j.apsusc.2011.11.061
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发表时间：
2012-01
影响因子：
6.7
通讯作者：
T. Ting;Y. N. Jau;R. Yu
中科院分区：
文献类型：
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作者：
T. Ting;Y. N. Jau;R. Yu
采用原位聚合法制备了不同苯胺/多壁碳纳米管质量比（Ani/MWNT=1/2、1/1、2/1和3/1）的聚苯胺/多壁碳纳米管（PANI/MWNT）复合材料，并将其引入环氧树脂中作为微波吸收剂。采用傅里叶变换红外光谱、紫外-可见分光光度计、x射线衍射、扫描电镜、透射电镜和电子自旋共振等手段对PANI/MWNT复合材料的形成过程进行了光谱表征。利用自由空间法在2-18和18-40GHz微波频率范围内测量了复合介电常数、复磁导率和反射损耗，研究了微波吸收性能。结果表明，聚苯胺的加入有助于在较宽的频率范围内获得较大的吸收，特别是对较高的频率值。
Polyaniline/multi-walled carbon nanotube (PANI/MWNT) composites were synthesized using in situ polymerization at different aniline/multi-walled carbon nanotube weight ratios (Ani/MWNT=1/2, 1/1, 2/1 and 3/1) and introduced into an epoxy resin to act as a microwave absorber. The spectroscopic characterization of the process of formation of PANI/MWNT composites were studied using Fourier transform infrared spectroscopy, an ultraviolet–visible spectrophotometer, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and electron spin resonance. The microwave absorbing properties were investigated by measuring complex permittivity, complex permeability and reflection loss in the 2–18 and 18–40GHz microwave frequency range, using the free space method. The results showed that the addition of PANI was useful for achieving a large absorption over a wide frequency range, especially for higher frequency values.